The first name that comes to mind on seeing a plant of this species is probably Argyroderma fissum (unless you are a real expert of course).
The two species share the same growth form as well as size and shape of the leaves; often they also grow near to each other. Fortunately the fruits are rather different and stay on the plants for a long time. (The Antimima has fruits with 5 locules, whereas in Argyroderma fruits there are at least 10 compartments).
The finger-shaped leaves are up to 3 cm long. The flowers come mostly in threes and appear in May-July; they are pinkish-purple and 1.8-2.5 cm in diameter.
In some places the species forms large mats on flats or gentle loamy slopes with an open cover of quartz pebbles. According to the literature, it occurs in the Vredendal-Vanrhynsdorp area, but last year I also found plants in the northern half of the Knersvlakte.